2002 Subaru Outback Base, 4D SedanFACTORY OEM SERVICE PROCEDURE

G Sensor: Inspection

PROBLEM SYMPTOM TABLE - G SENSOR

NO.  STEP  CHECK  YES  NO 
1  CHECK SUBARU SELECT MONITOR  Do you have SUBARU SELECT MONITOR? Go to step 5 Go to step 2
2  CHECK G SENSOR 
  1. Turn ignition switch to OFF
  2. Remove G sensor from vehicle
  3. Connect connector to G sensor
  4. Turn ignition switch to ON
  5. Measure voltage between G sensor connector terminals
 Is the voltage 2.3±0.2 V when G sensor is horizontal? Go to step 3 Replace G sensor
3 CHECK G SENSOR 
Measure voltage between G sensor connector terminals.
Connector & terminal: (R70) No.2 (+) - No.3 (-)		 Is the voltage 3.9±0.2 V when G sensor is inclined forwards to 90°? Go to step 4 Replace G sensor
4 CHECK G SENSOR 
Measure voltage between G sensor connector terminals.
Connector & terminal: (R70) No.2 (+) - No.3 (-)		 Is the voltage 0.7±0.2 V when G sensor is inclined backwards to 90°? G sensor is normal G sensor is normal
5 CHECK G SENSOR 
  1. Turn ignition switch to OFF
  2. Connect select monitor connector to data link connector
  3. Turn select monitor into (BRAKE CONTROL) mode
  4. Set the display in the (Current Data Display & Save) mode.
  5. Read the G sensor output voltage
 Is the indicated reading 2.3±0.2 V when the vehicle is in horizontal position? Go to step 6 Replace G sensor
6 CHECK G SENSOR 
  1. Remove console box
  2. Remove G sensor from vehicle. (Do not disconnect connector0
  3. Read the select monitor display
 Is the indicated reading 3.9±0.2 V when the vehicle is inclined forwards to 90°? Go to step 7 Replace G sensor
7 CHECK G SENSOR
Read the select monitor display		 Is the indicated reading 0.7±0.2 V when the G sensor is inclined backwards to 90°? G sensor is normal Replace G sensor
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When to See a Mechanic

Stop DIY work and contact a certified mechanic immediately if any of the following apply:

  • • You smell fuel, burning insulation, or see smoke.
  • • Brakes feel soft, pull hard to one side, or make grinding noises.
  • • The engine overheats, stalls repeatedly, or misfires under load.
  • • You are missing required tools, torque specs, or safe lifting equipment.
  • • You are not confident in the next step or safety outcome.